Question about Apple 22" Cinema Display Monitor
I tried to put an apple 22inch cinema (Acrylic ) onto a g5 2.5 dual with a n acd and dvi running a Formac screen . It turned on but showed a curious No Entry white diagonal bar in a white circle.
I used the Apple display monitor and adaptor in the dvi slot and even swapped the monitors around plugging it in directly . with the same result
Now any screens I try are either white or display a white circle with a no entry style bar across
Previously it worked with an Apple acrylic 17 inch screen and the Formac display
I have restarted , used dvi , used apple displays . dvi displays displays with adaptors , no adaptors , a combination and other apple and sony screens .Now nothing works and all I have is a white screen or pair of white screens
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Posted on Jan 02, 2017
SOURCE: Apple 20" display black screen
I've read that aftermarket DVI cable adapters don't work well with this set-up. You might try the Apple DVI to ADC adapter. It's expensive but I see them on eBay or craigslist from time to time at less than half the normal $99 cost.
Posted on Aug 17, 2009
This may be an issue with the display detecting the wrong video format or is using an unsupported resolution for this Apple Cinema Display 22"
• Make sure your Mac is turned off.
• Once your Mac is shutdown, you will need to perform what is called a PRAM reset (Parameter RAM)
• Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously .
• Turn on the computer.
• Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
• Now, hold the keys down until the computer restarts and you hear the start up sound for the third time.
• Release the keys and allow the Mac to start up.
If that does not help here is additional support reference from Apple regarding its LCD displays:
Apple Support Link:
Power Light Flash Issues
Let me know if this helps!
Posted on Jan 31, 2010
Moozer you are a Genius! Blocking the middle pin with electrical tape worked for me too.... non working Apple 23 inch HD display with short-long-short flashing white LED issue...
Posted on Sep 06, 2010
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